Roll.



E. PARKER.

BOLL.

APPLIUATION NLM) SEPT. 21, 1911.

VVD/701e. Hou/ard Parker vAA lHORA/JW.

sunrise entranti? ernten ,y

. Be it known that l, Howann lanunu, a

. citizen'ot the United States, and resident ot Nashua, in the county ot Hillsboro and State of New Hampshire, have invented certain new and useful improvements in liti Rolls, of which the following is a specinf.-

cation.

. The object of this invention is to produce a roll for use in the manufacture of pulp and paper having features of novelty and advantagev Theconstruction is particulaily` adrestageous as applied to suction rolls, such for instance as are used for the extraction ofV moisture lfreni a' Webot pulp or paper. In Patent No. 747,682 granted to me December 22d, 1908 the general structure of a roll of this sort, or at least one type ofconstruction', is clearly illustrated, Ywhere it will be seen that the roll is divided into longitudi nal compartments, provision being made for applying suction so as to draw moisture from the Web, which contacts with a por-i tion of the surface of the roll, into the core of the roll.

The present invention is concerned with.

the formation ot the surface or shell of the roll. The purpose being to produce a shell of sufficient rigidity to withstand the encessive strains to which' devices ci' this kind are subjected and to form the shell in such manner that it will not mark the web of pulp or paper which comes in contact with it and yet 1s so constructed as to provide a maximum of suction Vor drainage area. A ractical and economical construction conii iiining all of these desirable features is illus- :trame or skeleton' of the roll, except that it shall Abe of sutlicient strength to properly support theshell, and when used as a suction roll that it shall be provided 'with suitable compartments, ll have illustrated and Patented Sept. it, initd.

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To all; avlium it 'may' concern:

will briefly describe a 'conventional construc- Y tion of this-portion ot the device.

o is the core,. the partitions with theii edges joined together and spaced apart by the rings c which are soldered into the slots" in the partitions in which they rest, d being' rods extending lengthwise of the roll be# tween the partitions resting in notches in the rings @land with their ends secured in the flanges of. the roll.` A series of notches ui spiral arrangement are now cut in the edges of `the partitions and the surfaces of the rods. Y

The shell is termed by winding on to the from@ Ta rod i 0i metal, which is polygonal `in cross section-and which is seated in the notches in the partitions and rods (Z. The f cross section ci this rod nis polygonal and -v preferably in the shape of a parallelogram, and more particularlyrect-angular, and the convolu'tioiis. are spaced apart only a slight? amount, for instance, from ligt-h to gnd ofv an inc h. The upper surface of the rod r when in place on the frame is preferably flush with theedges ot the partitions'and the rod is soldered into the notches in the partitions in order that each compartment shall be completely isolated from the adjacent compartments to prevent the breaking ot the vacuum in any one compartment, it being understood that in the ordinary use of a device of this kind but a small number outv compartments are."` subjected to.'

the action of the suction at the: same time. if therod r-be of greater dimension one sol Way th'an the other itis Wound on edgesof"y that the greater dimension becomes thedepth. lt will be apparent that `this construction produces a sinofah, dat, even sur-h@ tace for the roll, that the opposing'. sidesof adjacent convolutions which foi'in'thewalls of the suction or drainage passages `are parallel, and that the full strength 'of the4 v rod is utilized 'tov give such stiffness to the shell that it will not yield or buckle under,"-

great pressure` By constructing the shell in this Way an amply large suction or drainage Way is provided and at the saine timer the surface of the shell is so practically continuous owing to the close proximity o the various convolutions thatV marking' of the `web which comes licontact with the surfaceof the shell is obviated. The regularity ,1. l

in the shape of the crosssection o*- the suc? tion or drainage spaces 1s advantageous in insuring a more regular and uniform action of the vacuum.

By this constructiog-,I roduce a roll the shel of which might described as made up of a series of circumferentially arranged bars separated by circumferentially extendiiig suction spaces, the completed structure having the appearance of a solid plate cir.

- cumferentially slit between-the partitions ture as fairly come Within the vspirit of the! invention. .i

Iclaim as my invention: Y. A working surface for a roll adapted for, in pulp vand paper machinery formed from a metallicrod of rectangular cross secv j- 2.] acent compartments.

tion Wound spirally onto a frame with adjacent convolutions spaced slightly apart to. form suction and drainage spaces.

2. The combination with a roll frame comprising a shaft, longitudinally extendin'g, radially disposed partitions, spacing rin connectingt eedges osa-id partitions,

an' frame rods supported b lsaid rings and vextendingv longitudinally o the frame, of a Working surface for. said roll formed ofv a rod of metal of rectangular cross section Y wound spirally onto said frame and seated in notches insaid partitions, the adjacent convolutions of said bar being spaced apart slightly, said bar being sealed in the notches in' the partitions in order to isolate the comartments between the'partitions from ad- 1 HOWARD PARKER.

Witnesses:

' ROBERT A. FRENCH,

N. F. Rani. 

